CVEs / CVE-2025-24983
CVE-2025-24983: Microsoft Windows Win32k Use-After-Free Vulnerability
- Known exploited in the CISA KEV catalog since 11 Mar 2025
- high 7 CVSS 3.1 (from the CNA)
- EPSS 1.87% chance of exploitation in the next 30 days, higher than 79% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2025-24983
Summary
Microsoft Windows Win32 Kernel Subsystem contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
Description
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1507 | from 10.0.10240.0, before 10.0.10240.20947 | 10.0.10240.20947 |
| Microsoft Windows 10 Version 1607 | from 10.0.14393.0, before 10.0.14393.7876 | 10.0.14393.7876 |
| Microsoft Windows Server 2008 R2 Service Pack 1 | from 6.1.7601.0, before 6.1.7601.27618 | 6.1.7601.27618 |
| Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) | from 6.1.7601.0, before 6.1.7601.27618 | 6.1.7601.27618 |
| Microsoft Windows Server 2008 Service Pack 2 | from 6.0.6003.0, before 6.0.6003.23168 | 6.0.6003.23168 |
| Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) | from 6.0.6003.0, before 6.0.6003.23168 | 6.0.6003.23168 |
| Microsoft Windows Server 2012 | from 6.2.9200.0, before 6.2.9200.25368 | 6.2.9200.25368 |
| Microsoft Windows Server 2012 (Server Core installation) | from 6.2.9200.0, before 6.2.9200.25368 | 6.2.9200.25368 |
| Microsoft Windows Server 2012 R2 | from 6.3.9600.0, before 6.3.9600.22470 | 6.3.9600.22470 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | from 6.3.9600.0, before 6.3.9600.22470 | 6.3.9600.22470 |
| Microsoft Windows Server 2016 | from 10.0.14393.0, before 10.0.14393.7876 | 10.0.14393.7876 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0, before 10.0.14393.7876 | 10.0.14393.7876 |
Exploitation
| In CISA KEV since | 11 Mar 2025 |
|---|---|
| Due date for US federal agencies | 1 Apr 2025 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 7 highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-416 |
References
- CVE-2025-24983 on NVD
- CVE-2025-24983 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24983 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24983 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24983 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.